15. Find the answer

In a colony, 150 families have coffee, 132 families have tea, and 122 families have milk. There are a few families who have more than one drink; 80 of them have coffee and tea, 59 of them have tea and milk, 42 of them have coffee and milk, and 20 of them have all three drinks. If each of the family have atleast one of these drink then find the following:

 

(i) Number of families have only one drink \(=\) .

 

(ii) Number of families have atleast two drinks \(=\) .

 

(iii) Total number of families in the colony \(=\) .